Adjustable window-scaffold.



G. E. LOEBEL.

ADJUSTABLE WINDOW SCAFFOLD.

APPLICATION FILED FEB. 17. 1915.

1 ,2]. 0,81 9. v Patented J an. 2, 1917.

2 SHEETSSHEET I.

mr mums versus co.. PNOIWLIYNQ. WASHING TON. p. c.

G. E. LOEBEL.

ADJUSTABLE WINDOW SCAFFOLD.

APPLICATION FILED FEB. I7. 1915.

1 ,21 0,8 1 9 Patented Jan. 2, 1917.

2 SHEETS-SHEET 2.

GEZoeZe/ w: mmms puns c0., I'namurna. wAsnuvt: mm A UNTTED GEORGE E.LOEBEL, OF WEST ALLIS, WISCONSIN.

ADJUSTABLE WINDOW-SCAFFOLD.

Specification of Letters Patent.

Patented J an. 2, 1917.

Application filed February 1'7, 1915. Serial N 0. 8,841.

To all whom it may concern:

Be it known that I, GEORGE E. LOEBEL, a citizen of the United States,residing at lVest Allis, in the county of Milwaukee and State ofWVisconsin, have invented certain new and useful Improvements inAdjustable lVindow-Scaffolds; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The invention relates to an adjustable window scaffold.

The object of the present invention is to improve the construction ofadjustable window scaffolds and to rovide a simple, practical andefficient scafiold designed for washing the outside of windows of highbuildings and adapted to afford perfect safety to enable it to be usedon the highest buildings of the sky scraper type and capable ofaffording adjustment to enable it to fit windows of different widths.

A further object of the invention is to provide an adjustable windowsoafiold of this character designed for the use of painters and variousother workmen and adapted to afford a stage or platform of the desiredsize and capableof being applied to various portions of a building forenabling workmen to operate on the exterior thereof.

With these and other objects in view the invention consists in theconstruction and novel combination and arrangement of parts hereinafterfully described, illustrated in the accompanying drawings and pointedout in the claim hereto appended, it being understood that variouschanges in the form, proportion and minor details of construction may beresorted to without departing from the spirit or sacrificing any of theadvantages of the invention.

Figure. 1 is a side elevation of an adjustable window scaifoldconstructed in accordance with this invention and shown applied to awindow, a portion of a building being in section, Fig. 2 is a transversesectional view of the same on line 22 of Fig. 1, Fig. 3 is a plan viewof the window scaffold, the wall of the building being in section, Fig.i is an enlarged detail sectional view illustrating the construction ofthe adjustable clamping members, and Fig. 5 is a detail transversesectional view of one of the side supporting bars.

Like numerals of reference designate corresponding parts in all thefigures of the drawing.

In the accompanying drawing in which is illustrated the preferredembodiment of the invention, l1 designate a pair of side supporting barsarranged horizontally and extending outwardly from a window 2 andpreferably constructed of malleable channel metal but any other suitablematerial, may of course be employed. These supporting side bars areprovided at the inner ends with integral downwardly extending hooks,having horizontal projecting bills 4 adapted to engage under a windowsill interiorly of a building as clearly illustrated in Fig. 1 of thedrawing whereby the side bars are securely interlocked with the wall.

The side supporting bars are clamped and securely maintained ininterlocking relation with the wall by means of clamping members 5constructed of malleable metal or other suitable material and consistingof bars or plates arranged upon the upper faces of the side bars andprovided with depending hooks 6 formed integral with said plates or barsand extending downwardly through slots 7 in the side supporting bars 1.The hooks 6 have horizontally disposed inwardly projecting engagingportions or bills 8 which engage under the window sill 9 and the outeredge thereof. By this construction, the window sill is securely grippedbetween the inner and outer hooks and the scaffold is firmly andsecurely mounted in position and there is no liability of it becomingaccidentally disengaged from the window sill. The said slots 7 extendlongitudinally of the side supporting bars, and are of suflicient lengthto afford the'desired adjustment for enabling the window scaffold to beapplied to window sills of diiferent sizes.

The clamping members are secured in their adjustment by means ofvertical bolts 10 arranged in the slot 7 of the side bars and providedat their upper ends with thumb nuts 11, but any other suitable means maybe employed for retaining the clamping members in engagement with theouter edge of the window sill.

The side supporting bars are provided with upwardly projecting arms 12which are connected by a horizontal brace or bar 13 adjustably securedat its terminal portions to the said arms 12 by means of bolts 14 orother suitable fastening means. This trans verse brace or bar ispreferably provided at 16 and the side bars are also connected at apoint intermediate of their ends by a transversely disposed board 17constituting Y a platform and provided at each of its terminal portionswith a series of perforations 18 for the reception of a bolt 19 having athumb nut 20 and adapted to be arranged in different perforations whichcorrespond with those of the bar or brace 13. The board 17 which forms astage or platform is designed to be of various lengths to adapt thescaffold to the use of painters and other workmen and the sidesupporting bars may be arranged at any desired distance apart to affordthe necessary stage room or space for the use of one or more workmen.The brace or bar 13 is preferably constructed of metal while theplatform 17 is designed to be made of board, but any other suitablematerial may be employed. The supporting bars are rigidly supported in ahorizontal projecting position by inclined braces 21 pivoted at. theirouter ends 22 to the side supporting bars 1, preferably at the outerside edges thereof and extending downwardly and inwardly and havingtheir inner lower ends23 fitted against the exterior of the wall of thebuilding to which the scaffold is applied. The lower or inner ends ofthe pivoted supporting braces 21 may be bent at an angle as shown toprovide abutting portions for engaging the wall of the building and thesaid braces 21 are provided at their lower ends with eyes 24 into whichare linked chains 25 for connecting the lower ends of the braces withthe inner portions of the side supporting bars, but any other suitableflexible connection may of course be employed for this purpose.

The chains are equipped at their upper ends with hooks 26 for engagingeyes 27 which depend from the inner portions of the side supporting barsand preferably con- Gopies of this patent may be obtained for sist ofeye-bolts. These eyes are of sufficient size to enable thechai n, ifnecessary to be passed through them to secure any adjustment of theflexible connection. The inclined braces 21 relieve the hooks of strainand enable the scaffold to support the required weight without liabilityof unduly straining the means for detachably interlocking the innerportions of the side bars with the window sill.

lVhat is claimed is A window. scaffold extending entirely across thespace between the sides of a window frame and adjustable to suit thewidth of the windowand comprising a pair of channeled supporting barsprovided at their inner ends with books for engaging a win dow sill atthe inner edge thereof, said supporting bars being also provided attheir outer ends with upwardly extending arms and having longitudinalslots located intermediate of their ends, clamping members consisting ofbars of greater width than the slots arranged upon the upper faces ofthe supporting bars and provided with hooks extending downwardly throughthe slots and arranged to engage the window sill under the outer edgethereof to hold the scaffold against upward movement, fastening devicesspaced from the hooks and operating in the slots to secure the clampingmembers in their adjustment, a platform adj'ustably secured upon thesupporting bars, a bar con necting the arms and also adjustably securedto the latter, said connecting bar and platform maintaining thesupporting bars in proper spaced relation at the sides of the windowframe and inclined braces pivoted to the flanges of the channeledsupporting bars'and adapted to fit against the exterior of a wall. 1

Intestimony whereof I afiix my signature in presence of two witnesses.

GEORGE fit. LoEBiiL. Witnesses: i I

GILBERT O lsim, W. J. CLEVELAND.

five cents each, by addressing the ffloinmissioner bf Patents,Washington, D. 0. i

